House Dust Mite Allergy

House dust mite allergy is an immune reaction to proteins in mites and their waste, often causing nasal, eye or chest symptoms indoors.

Mites are tiny organisms that thrive in warm, humid household settings and feed on shed skin. Their particles can collect in bedding, upholstered furniture, carpets and soft toys. Symptoms may become more noticeable during cleaning, making a bed, or spending time in a dusty room.

Very common presentations include sneezing, a runny nose and itchy eyes. A blocked nose and itchy throat are also common in people with house dust mite allergy. Symptoms can fluctuate with indoor exposure and may be worse on waking after contact with bedding.

Some people also develop cough, wheeze or chest tightness when allergy affects the airways. These symptoms deserve medical assessment, especially for someone with known asthma or a change in breathing.

The allergy is caused by sensitisation to mite proteins rather than by dust itself. Movement through a room can disturb these particles, while fabrics and mattresses can hold them close to the face during sleep. Irritants such as smoke, strong fragrances or respiratory infections can make nasal or chest symptoms feel more troublesome without being the original allergy trigger.

An allergic tendency can run in families. People with eczema, allergic rhinitis or asthma may be more likely to recognise related symptoms. Homes with substantial soft furnishing, limited ventilation or persistent dampness can provide conditions in which mite material accumulates.

A clinician will ask when symptoms occur, which rooms are involved and whether there are eye, skin or breathing symptoms. Examination may look for nasal inflammation and signs of another cause. Allergy testing can help confirm whether mite sensitisation fits the history; a result is interpreted alongside symptoms, not on its own.

Management combines reducing exposure where practical with treatment for the symptoms that matter most. Saline rinses, nasal sprays, antihistamines or eye drops may be considered depending on the symptom pattern and a clinician’s advice. Allergy medication should be selected with attention to age, pregnancy, other health conditions and possible drowsiness.

If wheeze, persistent cough or breathlessness occurs, seek prompt clinical advice. A personalised plan is particularly useful for people who also have asthma.

Focus effort on the room where symptoms are most persistent, often the bedroom. Wash bedding regularly according to the fabric instructions, reduce dust-catching clutter around the bed, and use a damp cloth or vacuum method that limits particles becoming airborne. If another person can clean while you are away from the room, that may reduce immediate irritation.

Keep rooms dry and well ventilated where possible, repair sources of dampness, and clean soft furnishings in a manageable routine. Changes do not need to be all-or-nothing: start with bedding and the area where you spend the most time, then review whether symptoms change.

Arrange a review when symptoms interrupt sleep, work or school, when pharmacy treatments are not helping, or when the trigger is unclear. Urgent assessment is needed for severe breathing difficulty, swelling of the face or throat, faintness, or rapidly worsening wheeze.